Added attempt attribute to Submission
Merge pull request #65 from hhoang/master

Added attempt attribute to Submission
Fixed include[] parameter for submission comments
Implemented getComparisonDate for SubmissionComment
Created method called getCreatedAtDate() which returns created_at as a Date object
Added short date helper to DateHelpers and fixed pluralization on Submission comments setter
Merge pull request #66 from hhoang/master

Fixed include[] parameter for submission comments
Merge remote-tracking branch 'upstream/master'
Added setter for a submission's rubric_assessments
Pagination support for assignments and freeform rubric comments

 - Added nextPage method for assignmentslist
 - Added ability to grade a submission using a rubric assessment
 - Added support for freeform rubric comments for assignments
Merge remote-tracking branch 'upstream/master'
Fixed spelling on assessments
Merge pull request #67 from hhoang/master

Added setter for a submission's rubric_assessments
Merge remote-tracking branch 'upstream/master'
Support for needs_grading_by_section in Assignments List
Support for needs_grading_count_by_section in assignments list
Fixed typo in request params
Merge pull request #68 from hhoang/master

Support for needs_grading_count_by_section
Added Canvadocs preview_url to Attachments
fixed whitespacing